CN107931764B - Production process of ceramic soldering tin nozzle - Google Patents
Production process of ceramic soldering tin nozzle Download PDFInfo
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- CN107931764B CN107931764B CN201711231836.2A CN201711231836A CN107931764B CN 107931764 B CN107931764 B CN 107931764B CN 201711231836 A CN201711231836 A CN 201711231836A CN 107931764 B CN107931764 B CN 107931764B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/005—Soldering by means of radiant energy
- B23K1/0056—Soldering by means of radiant energy soldering by means of beams, e.g. lasers, E.B.
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/06—Solder feeding devices; Solder melting pans
- B23K3/0646—Solder baths
- B23K3/0653—Solder baths with wave generating means, e.g. nozzles, jets, fountains
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Abstract
A ceramic soldering tin nozzle and a production process thereof, wherein the ceramic soldering tin nozzle comprises a tubular nozzle body, the nozzle body is provided with a circular inner hole for injecting a solder ball along the length direction, the upper half section side wall of the inner hole adopts a straight extension structure, the front end of the nozzle body is provided with a nozzle outlet, the lower half side wall of the inner hole is a cone which is gradually reduced from the joint of the upper half side wall of the inner hole to the opening of the nozzle outlet, the soldering tin nozzle adopts the front end taper design, the occurrence of ball clamping is effectively controlled, the solder ball can be quickly positioned along the 20-degree taper of the inner hole at the moment of conveying the solder ball to the solder nozzle without the difference in height or position, the accurate temperature of the tin liquid can be ensured when the solder balls are melted by laser after the solder balls are quickly and accurately positioned, and high-precision welding can be effectively ensured.
Description
Technical Field
The invention relates to the technical field of ceramic soldering tin, in particular to a ceramic soldering tin nozzle and a production process thereof.
Background
The soldering tin trade includes high-speed accurate little tin soldering, laser droplet tin welding, laser tin ball welding, tin bead welding etc. fig. 1 is the schematic view of traditional tin soldering welding process, as shown in fig. 1, what adopt among the welding process is that laser passes through optical fiber transmission, its delivery outlet is installed in tin ball export top, be provided with the entry that high-pressure gas got into on annular cavity, melt the tin ball through laser, then high-pressure inert gas can guarantee to have sufficient pressure to drip the molten tin ball, can guarantee again that molten tin solder can not by the oxidation, the welding precision is high, it is effectual to weld.
The soldering tin nozzle in the industry is the most critical and most central part in the set of system, and has high requirement on dimensional precision, and high requirements on finish concentricity and oxidation resistance of non-stick tin. However, in the existing relation between the design technology and the processing restriction, the original solder nozzle design can only be made into a full cone form by using tungsten steel materials, and the full cone type solder nozzle has more defects: 1. the taper is long, the gradient is long, the angle is small, poor welding is caused by easy clamping in the middle and unstable height when the solder ball falls in due to the influence of the tolerance and roundness of the solder ball, and the fine and precise welding requirement is limited; 2. because the inner hole angle is small, the contact area of the melted solder ball and the solder nozzle is large, and the distance is long, the heat taken away by the solder nozzle when the solder ball is melted influences the welding result, causes factors such as unstable welding and the like.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a ceramic soldering tin nozzle and a production process thereof, so as to solve the problem that the welding quality is influenced because the traditional soldering tin nozzle only can be made of tungsten steel materials to be in a full cone shape.
In order to achieve the purpose, the invention provides a ceramic soldering tin nozzle, which comprises a tubular nozzle body, wherein a circular inner hole for injecting a tin ball is arranged in the nozzle body along the length direction, the upper half side wall of the inner hole adopts a straight extension structure, the front end of the nozzle body is provided with a nozzle outlet, and the lower half side wall of the inner hole is a cone which is gradually reduced from the joint of the upper half side wall of the inner hole to the opening of the nozzle outlet.
In a further preferred embodiment of the present invention, the nozzle body has a length of 10 mm.
As a further preferable technical scheme of the invention, the pipe diameter of the inner hole in a straight extension structure is phi 1.74mm, the caliber of the outlet of the nozzle is phi 0.49mm, and the angle of a conical included angle of the lower half-section side wall of the inner hole is 20 degrees.
The invention also provides a production process of the ceramic soldering tin nozzle, which specifically comprises the following steps:
step S1, the ingredients are fully densified in a densification machine for 20 to 30 minutes so as to ensure that each part of the materials are fully and uniformly stirred to form pulp;
step S2, adding the uniform slurry into a hopper of a ceramic injection molding machine, and molding by adopting a cold chamber forced molding machine to obtain a nozzle blank;
step S3, placing the nozzle blank into a fire-resistant jig, and placing the nozzle blank into a high-temperature furnace for dewaxing and degreasing treatment;
step S4, placing the dewaxed nozzle blank into a sintering jig, placing the nozzle blank into a high-temperature sintering furnace for sintering, wherein the sintering temperature is 1750-1860 ℃, keeping for 10-12 hours after reaching the sintering temperature, and then closing the furnace and naturally cooling to normal temperature;
step S5, putting the sintered nozzle blank into vacuum high-temperature equipment for carbon adding vacuum blackening treatment, wherein the treatment time is 48 hours, and the temperature is 1100-1300 ℃, so that the nozzle blank becomes black;
step S6, grinding and polishing the nozzle blank which is changed into black so as to enable the outer diameter and the inner hole of the nozzle blank to meet the design requirements;
and step S7, cleaning the nozzle blank which is ground and polished to meet the requirements by using 10% diluted hydrochloric acid, cleaning by using clear water, and drying to obtain the finished nozzle.
As a further preferable technical solution of the present invention, the ingredients in step S1 include: al (Al)2O3Powder, glycerol palmitate, ester hexamethylphosphoric triamide, polyvinyl alcohol, graphite powder, feldspar, acrylic acid, allyl polyethylene glycol and low-temperature paraffin.
As a further preferable technical scheme of the invention, the mass ratio of the ingredients is as follows:
Al2O3powder 80-90
Palmitic acid glycerol 0.8-1
0.5-0.8 parts of ester hexamethylphosphoric triamide
Polyvinyl alcohol 0.5-1
Graphite powder 0.1-0.6
Feldspar 0.1-0.6
Acrylic acid 0.3-0.8
0.3-0.8 allyl polyethylene glycol
Low-temperature paraffin 7.2-10
Wherein, Al2O3The purity of the powder is above 99.9%, and the particle size of the material is 1-3 μm.
As a further preferable technical solution of the present invention, the step S3 of placing the nozzle blank into a refractory jig and placing the nozzle blank into a high temperature furnace for dewaxing and degreasing treatment specifically includes the following steps:
s31, putting the fire-resistant jig carrying the nozzle blank, opening the high-temperature furnace to slowly heat to 370-400 ℃, wherein the temperature of the furnace bore when the nozzle blank is put into the high-temperature furnace is not higher than 50 ℃, and the temperature rise time period is controlled to be 3-4 hours, so that the moisture and paraffin in the nozzle blank are heated from Al2O3Melting and gasifying to flow out;
s32, keeping the temperature of the furnace bore for 2-3 hours after the temperature of the furnace bore reaches 370 ℃;
s33, raising the temperature of the furnace bore to 750-800 ℃ and keeping the temperature for 2-3 hours so as to fully decompose, burn and gasify each decomposable ingredient in the nozzle blank, and finally closing the high-temperature furnace and naturally cooling to the normal temperature.
As a further preferable technical scheme of the invention, when the nozzle blanks are placed in the refractory jig, a 3mm distance is reserved between the nozzle blanks so that enough space is reserved for evaporation.
As a further preferable embodiment of the present invention, when the nozzle blanks after dewaxing are set in the sintering jig in step S4, the nozzle blanks are sequentially brought together and aligned without applying an external force.
The invention can achieve the following beneficial effects:
the ceramic soldering tin nozzle comprises a tubular nozzle body, wherein a circular inner hole for injecting the solder balls is formed in the nozzle body along the length direction, the upper half-section side wall of the inner hole adopts a straight extension structure, the front end of the nozzle body is provided with a nozzle outlet, and the lower half-section side wall of the inner hole is a cone gradually reduced from the joint of the upper half-section side wall of the inner hole to the opening of the nozzle outlet, so that the soldering tin nozzle adopts a front-end taper mode design, the condition of ball clamping is effectively controlled, the solder balls can be quickly positioned along the 20-degree taper of the inner hole at the moment of conveying the solder balls to the soldering tin nozzle, the difference in height or position cannot occur, the accurate temperature of the solder liquid can be ensured when the laser solder balls are emitted and melted after the solder balls are quickly and accurately positioned, and the high-precision welding can be effectively ensured.
The production process of the ceramic soldering tin nozzle comprises the following steps: fully and densely refining the ingredients in a compacting machine for 20 to 30 minutes to ensure that each part of the materials are fully and uniformly stirred to form slurry; adding the uniform slurry into a hopper of a ceramic injection molding machine, and molding by adopting a cold chamber pressure molding machine to obtain a nozzle blank; putting the nozzle blank into a refractory jig, and putting the nozzle blank into a high-temperature furnace for dewaxing and degreasing treatment; putting the dewaxed nozzle blank into a sintering jig, and putting the nozzle blank into a high-temperature sintering furnace for sintering, wherein the sintering temperature is 1750-1860 ℃, keeping for 10-12 hours after the sintering temperature is reached, and then closing the furnace and naturally cooling to the normal temperature; putting the sintered nozzle blank into vacuum high-temperature equipment for carbonization and vacuum blackening, wherein the treatment time is 48 hours, and the temperature is 1100-1300 ℃, so that the nozzle blank becomes black; grinding and polishing the nozzle blank which is turned into black so that the outer diameter and the inner hole of the nozzle blank meet the design requirements; the nozzle blank which meets the requirements of grinding and polishing treatment is cleaned by 10 percent of dilute hydrochloric acid, and then cleaned and dried by clear water to obtain the finished nozzle, so that the soldering tin nozzle adopts a front-end taper form design, the condition of ball clamping is effectively controlled, the solder ball can be quickly positioned along the taper of 20 degrees of an inner hole at the moment when the solder ball is conveyed to the soldering tin nozzle, the difference in height or position can not occur, the accurate temperature of tin liquid can be ensured when the solder ball is melted by emitting laser after the solder ball is quickly and accurately positioned, and the high-precision welding can be effectively ensured.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic view of a conventional soldering process;
FIG. 2 is a schematic structural view of an example provided by a ceramic solder nozzle according to the present invention;
FIG. 3 is a flow chart of an exemplary process for manufacturing a ceramic solder nozzle according to the present invention.
In the figure: 1. inner bore, 2, upper half sidewall, 3, lower half sidewall, 4, nozzle outlet, 100, nozzle body.
The objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments. In the preferred embodiments, the terms "upper", "lower", "left", "right", "middle" and "a" are used for clarity of description only, and are not used to limit the scope of the invention, and the relative relationship between the terms and the terms is not changed or modified substantially without changing the technical content of the invention.
Fig. 2 is a schematic structural view of an example provided by the ceramic solder nozzle of the present invention, as shown in fig. 2, the ceramic solder nozzle includes a tubular nozzle body 100, a circular inner hole 1 for injecting solder balls is provided in the nozzle body 100 along the length direction, the upper half sidewall 2 of the inner hole 1 adopts a straight extension structure, the front end of the nozzle body 100 is provided with a nozzle outlet 4, the lower half sidewall 3 of the inner hole 1 is a taper shape gradually reduced from the connection position of the upper half sidewall 2 of the inner hole 1 to the opening of the nozzle outlet 4, the solder nozzle of the present invention adopts a front end taper form design, effectively controls the occurrence of ball clamping, the solder ball can be quickly positioned along the taper of the inner hole of 120 degrees at the instant when the solder ball is conveyed to the solder nozzle, no difference in height or position occurs, and the accurate temperature of the solder liquid can be ensured when the solder ball is melted by emitting laser after the quick and accurate positioning, can effectively ensure high-precision welding.
In specific implementation, the length of the nozzle body 100 is 10mm, the pipe diameter of the inner hole 1 in a straight-extending position structure is phi 1.74mm, the caliber of the nozzle outlet 4 is phi 0.49mm, and the angle of the conical included angle of the lower half-section side wall 3 of the inner hole 1 is 20 degrees.
Fig. 3 is a flow chart of an example of a production process provided by the production process of the ceramic solder nozzle of the present invention, and as shown in fig. 3, the production process of the ceramic solder nozzle of the present invention specifically includes the following steps:
s1, fully compacting the ingredients in a compacting machine for 20-30 minutes to ensure that each part of the materials are fully and uniformly stirred to form slurry;
s2, adding the uniformly densified slurry into a hopper of a ceramic injection molding machine, and molding by using a cold chamber forced molding machine to obtain a nozzle blank;
s3, placing the nozzle blank into a refractory jig, and placing the nozzle blank into a high-temperature furnace for dewaxing and degreasing treatment;
s4, placing the dewaxed nozzle blank into a sintering jig, and placing the nozzle blank into a high-temperature sintering furnace for sintering, wherein the sintering temperature is 1750-1860 ℃, the sintering temperature is kept for 10-12 hours after reaching the sintering temperature, and then closing the furnace and naturally cooling to the normal temperature;
s5, putting the sintered nozzle blank into vacuum high-temperature equipment for carbon adding vacuum blackening treatment, wherein the treatment time is 48 hours, and the temperature is 1100-1300 ℃, so that the nozzle blank becomes black;
s6, grinding and polishing the nozzle blank which becomes black so that the outer diameter and the inner hole 1 of the nozzle blank meet the design requirements;
and S7, cleaning the nozzle blank which is ground and polished to meet the requirements by using 10% diluted hydrochloric acid, cleaning by using clear water, and drying to obtain the finished nozzle.
During the grinding and polishing treatment, the outer diameter of the inner hole 1 is ground and processed by a coreless grinder to enable the outer diameter to reach the specified size in the drawing, the outer diameter is clamped, an inner hole 1 is processed by an inner and outer circular grinder, the inner hole 1 is ground by a tapered 600# diamond grinding head, the grinding size of the inner hole 1 is reserved for 0.01mm, and two end faces of the inner hole 1 are ground by a flat grinder to reach the specified size in the drawing after being processed; and after the sizes are processed, putting the machined inner hole into fluid polishing equipment, and performing fluid polishing on the inner hole 1 by using diamond grinding paste with the particle size of less than 1 micrometer and engine oil, wherein the polishing pressure is controlled to be 3-3.5MPa, and the time is about 10 minutes, so that the size of the inner hole 1 is ensured to meet the requirements of drawings.
In a specific implementation, the ingredients in step S1 include: al (Al)2O3Powder, glycerol palmitate, ester hexamethylphosphoric triamide, polyvinyl alcohol, graphite powder, feldspar, acrylic acid, allyl polyethylene glycol and low-temperature paraffin.
In specific implementation, the mass ratio of the ingredients is as follows:
Al2O3powder 80-90
Palmitic acid glycerol 0.8-1
0.5-0.8 parts of ester hexamethylphosphoric triamide
Polyvinyl alcohol 0.5-1
Graphite powder 0.1-0.6
Feldspar 0.1-0.6
Acrylic acid 0.3-0.8
0.3-0.8 allyl polyethylene glycol
Low-temperature paraffin 7.2-10
Wherein, Al2O3The purity of the powder is above 99.9%, and the particle size of the material is 1-3 μm.
In specific implementation, the step S3 of placing the nozzle blank into a refractory fixture and placing the nozzle blank into a high-temperature furnace for dewaxing and degreasing includes the following steps:
s31, putting the fire-resistant jig carrying the nozzle blank, opening the high-temperature furnace to slowly heat to 370-400 ℃, wherein the temperature of the furnace bore when the nozzle blank is put into the high-temperature furnace is not higher than 50 ℃, and the temperature rise time period is controlled to be 3-4 hours, so that the moisture and paraffin in the nozzle blank are heated from Al2O3Melting and gasifying to flow out;
s32, keeping the temperature of the furnace bore at 370 ℃ for 2-3 hours;
s33, raising the temperature of the furnace bore to 750-800 ℃ and keeping the temperature for 2-3 hours so as to fully decompose, burn and gasify each decomposable ingredient in the nozzle blank, and finally closing the high-temperature furnace and naturally cooling to normal temperature;
in specific implementation, when the nozzle blanks are placed in the refractory jig, 3mm intervals are reserved among the nozzle blanks, so that enough space is reserved for evaporation, and enough space is reserved among the blanks for heating evaporation.
In specific implementation, when the nozzle blanks after dewaxing are placed in the sintering jig in step S4, the nozzle blanks are sequentially closed and arranged in order without applying an external force, and if an external force is applied, the blanks are easily damaged, and if gaps between the nozzle blanks are too large, the blanks are easily deformed during high-temperature sintering, so that a plurality of blanks need to be arranged in a mutual-dependent manner, so that the blanks are mutually supported and cannot be stacked together by the external force.
Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are merely examples and that many variations or modifications may be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims.
Claims (4)
1. A production process of a ceramic soldering tin nozzle is characterized in that,
the ceramic soldering tin nozzle comprises a tubular nozzle body, wherein a circular inner hole for injecting solder balls, laser and nitrogen is formed in the nozzle body along the length direction, the upper half side wall of the inner hole adopts a straight stretching structure, a nozzle outlet is formed in the front end of the nozzle body, and the lower half side wall of the inner hole is in a conical shape which is gradually reduced from the joint of the upper half side wall of the inner hole to the opening of the nozzle outlet; the length of the nozzle body is 10mm, the pipe diameter of the inner hole in a straight extension structure is phi 1.74mm, the caliber of the nozzle outlet is phi 0.49mm, and the angle of a conical included angle of the lower half-section side wall of the inner hole is 20 degrees;
the production process of the ceramic soldering tin nozzle comprises the following steps:
s1, fully compacting the ingredients in a compacting machine for 20-30 minutes to enable each part of the materials to be fully stirred to form pulp, wherein the ingredients comprise the following components in percentage by mass:
Al2O3powder 80-90
Palmitic acid glycerol 0.8-1
0.5-0.8 parts of ester hexamethylphosphoric triamide
Polyvinyl alcohol 0.5-1
Graphite powder 0.1-0.6
Feldspar 0.1-0.6
Acrylic acid 0.3-0.8
0.3-0.8 allyl polyethylene glycol
Low-temperature paraffin 7.2-10
Wherein, Al2O3The purity of the powder is more than 99.9 percent, and the granularity of the material is 1 to 3 mu m;
s2, adding the uniformly densified slurry into a hopper of a ceramic injection molding machine, and molding by using a cold chamber forced molding machine to obtain a nozzle blank;
s3, placing the nozzle blank into a refractory jig, and placing the nozzle blank into a high-temperature furnace for dewaxing and degreasing treatment;
s4, placing the dewaxed nozzle blank into a sintering jig, and placing the nozzle blank into a high-temperature sintering furnace for sintering, wherein the sintering temperature is 1750-1860 ℃, the sintering temperature is kept for 10-12 hours after reaching the sintering temperature, and then closing the furnace and naturally cooling to the normal temperature;
s5, putting the sintered nozzle blank into vacuum high-temperature equipment for carbon adding vacuum blackening treatment, wherein the treatment time is 48 hours, and the temperature is 1100-1300 ℃, so that the nozzle blank becomes black;
s6, grinding and polishing the nozzle blank which is turned into black so that the outer diameter and the inner hole of the nozzle blank meet the design requirements;
and S7, cleaning the nozzle blank which is ground and polished to meet the requirements by using 10% diluted hydrochloric acid, cleaning by using clear water, and drying to obtain the finished nozzle.
2. The process of claim 1, wherein the step S3 of placing the nozzle blank into a refractory fixture and placing the nozzle blank into a high temperature furnace for de-waxing and degreasing comprises the following steps:
s31, putting the refractory jig carrying the nozzle blank, opening the high-temperature furnace to slowly heat to 370 ℃, wherein the nozzle blank is put into high temperatureThe temperature of a hearth in a furnace can not be higher than 50 ℃, and the temperature rise time period needs to be controlled within 3-4 hours, so that the moisture and paraffin in the nozzle blank are heated from Al2O3Melting and gasifying to flow out;
s32, keeping the temperature of the hearth for 2-3 hours after the temperature of the hearth reaches 370 ℃;
s33, heating the hearth to 750-800 ℃ and keeping for 2-3 hours to fully decompose, burn and gasify each decomposable ingredient in the nozzle blank, and finally closing the high-temperature furnace and naturally cooling to normal temperature.
3. The process for manufacturing a ceramic solder nozzle according to claim 2, wherein the nozzle blanks are placed in a refractory jig with a predetermined distance of 3mm between them to allow sufficient space for evaporation.
4. The process for producing a ceramic solder nozzle according to claim 3, wherein the nozzle blanks are sequentially closed and aligned without applying an external force when the dewaxed nozzle blank is set in the sintering jig in step S4.
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| JPH01205869A (en) * | 1988-02-09 | 1989-08-18 | Canon Inc | Laser soldering device |
| CN100522442C (en) * | 2005-03-30 | 2009-08-05 | Tdk株式会社 | Soldering method, soldering device, bonding method, bonding device, and nozzle unit |
| JP2007245189A (en) * | 2006-03-16 | 2007-09-27 | Tdk Corp | Joining apparatus, and its nozzle unit |
| CN103358020A (en) * | 2012-03-28 | 2013-10-23 | 新科实业有限公司 | Device and method for forming electrical welding spots in disk driving unit |
| CN103265287B (en) * | 2013-05-23 | 2015-02-04 | 潮州三环（集团）股份有限公司 | Ceramic wristwatch dial and manufacturing method thereof |
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| US10040140B2 (en) * | 2014-12-29 | 2018-08-07 | Sae Magnetics (H.K.) Ltd. | Nozzle for connecting or disconnecting solder joints between head bonding pads in a hard disk drive, and laser soldering or reflowing tool with the same |
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